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Re: WOOD - Load bearing studs in a party wall -Reply

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Yes, this helps a lot. I probably would have missed the 0.78 factor.

Thanks,
Bill Allen
-----Original Message-----
From: Tim McCormick <TMCCORMI(--nospam--at)BAS.CI.LA.CA.US>
To: seaoc(--nospam--at)seaoc.org <seaoc(--nospam--at)seaoc.org>
Date: Thursday, October 23, 1997 9:35 AM
Subject: WOOD - Load bearing studs in a party wall -Reply


>>>> "Bill Allen" <BAllenSE(--nospam--at)mail-gw3.pacbell.net> 10/22/97 03:54pm >>>
>I am checking the load bearing capacity of a wood framed wall that is
>intended to be used in a party wall. This party wall consists of 2x4 studs
>@
>16" mounted on 2x6 top and bottom plates. . . .. . .
>
>Since I realize that I'm not the first structural engineer to be asked to
>use a party wall as a load bearing wall, I am curious what others have
>done in the past to determine the capacity of studs laterally braced on
>one face only.
>
>Regards,
>Bill Allen
>
>I have been told that some product approvals for metal studs require
>some type of bracing on the unsheathed side of walls but I have never
>seen it for wood. Maybe it is justified. What I do know, is that most walls
>of the type you are describing are rated fire resistive walls that require
a
>reduction for their one or two hour rating per UBC Table 7-B Footnote 19.
>There the max L/d is 33  instead of 50 and the maximum F'c is 0.78 of
>the normal. I recently reviewed the design of a church that needed to
>correct its exterior wall stud sizes to comply. Hope this is also useful
for
>you.
>
>Tim McCormick, P.E.
>City of Los Angeles -Building & Safety
>
>
>